Some things I’ve built: a flight delay tool that traces inbound aircraft using FlightAware data, a Tube name puzzle that uses bitwise logic to search 130k word / phrases instantly in the browser, and a Van Gogh audio guide that works offline without installation, with AI-generated translation and narration. I've also written a TypeScript wrapper for the TfL API and the only Copy as Markdown Chrome extension that supports real HTML tables.

My showcase has smaller experiments; my GitHub has the code.